From today’s inspection: are these the right kinds of rocks to use for flashing a combustion vent (this was for the furnace)?
Sorry… this was a joke. Just so you know, rocks aren’t used for roof flashing. This is what comes from no one thinking I have a sense of humor.
I thought someone would call me on this.
Go to http://www.nachi.org/forum/f59/home-intensive-green-roof-41210/ to see the home I inspected today.
No! Since it is a combustion vent, they should of used these instead.
http://static.flickr.com/2326/2262870830_ca3f6d2167.jpg
Lava Rocks:mrgreen:
LOL Kenton where in the world did you find that picture? 
Absolutely not!!! You should always use LAVA rocks, since they are preheat tested by NATURE and are, therefore, a “natural” choice.
Q (also, just joking)
:mrgreen::mrgreen:
Slate would be more appropriate… IMO